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<h2>ZooKeeper: Because Coordinating Distributed Systems is a Zoo</h2>
<p>ZooKeeper is a high-performance coordination service for distributed applications.  It exposes common services - such as naming, configuration management, synchronization, and group services - in a simple interface so you don't have to write them from scratch.  You can use it off-the-shelf to implement consensus, group management, leader election, and presence protocols. And you can build on it for your own, specific needs.</p>
<p>The following documents describe concepts and procedures to get you started using ZooKeeper. If you have more questions, please ask the <a href="http://zookeeper.apache.org/mailing_lists.html">mailing list</a> or browse the archives.</p>
<ul>
<li><strong>ZooKeeper Overview</strong> Technical Overview Documents for Client Developers, Administrators, and Contributors
<ul>
<li><a href="zookeeperOver.html">Overview</a> - a bird's eye view of ZooKeeper, including design concepts and architecture</li>
<li><a href="zookeeperStarted.html">Getting Started</a> - a tutorial-style guide for developers to install, run, and program to ZooKeeper</li>
<li><a href="releasenotes.html">Release Notes</a> - new developer and user facing features, improvements, and incompatibilities</li>
</ul>
</li>
<li><strong>Developers</strong> Documents for Developers using the ZooKeeper Client API
<ul>
<li><a href="apidocs/zookeeper-server/index.html">API Docs</a> - the technical reference to ZooKeeper Client APIs</li>
<li><a href="zookeeperProgrammers.html">Programmer's Guide</a> - a client application developer's guide to ZooKeeper</li>
<li><a href="zookeeperUseCases.html">ZooKeeper Use Cases</a> - a series of use cases using the ZooKeeper.</li>
<li><a href="javaExample.html">ZooKeeper Java Example</a> - a simple Zookeeper client application, written in Java</li>
<li><a href="zookeeperTutorial.html">Barrier and Queue Tutorial</a> - sample implementations of barriers and queues</li>
<li><a href="recipes.html">ZooKeeper Recipes</a> - higher level solutions to common problems in distributed applications</li>
</ul>
</li>
<li><strong>Administrators &amp; Operators</strong> Documents for Administrators and Operations Engineers of ZooKeeper Deployments
<ul>
<li><a href="zookeeperAdmin.html">Administrator's Guide</a> - a guide for system administrators and anyone else who might deploy ZooKeeper</li>
<li><a href="zookeeperQuotas.html">Quota Guide</a> - a guide for system administrators on Quotas in ZooKeeper.</li>
<li><a href="zookeeperJMX.html">JMX</a> - how to enable JMX in ZooKeeper</li>
<li><a href="zookeeperHierarchicalQuorums.html">Hierarchical quorums</a></li>
<li><a href="zookeeperObservers.html">Observers</a> - non-voting ensemble members that easily improve ZooKeeper's scalability</li>
<li><a href="zookeeperReconfig.html">Dynamic Reconfiguration</a> - a guide on how to use dynamic reconfiguration in ZooKeeper</li>
<li><a href="zookeeperCLI.html">ZooKeeper CLI</a> - a guide on how to use the ZooKeeper command line interface</li>
<li><a href="zookeeperTools.html">ZooKeeper Tools</a> - a guide on how to use a series of tools for ZooKeeper</li>
<li><a href="zookeeperMonitor.html">ZooKeeper Monitor</a> - a guide on how to monitor the ZooKeeper</li>
<li><a href="zookeeperAuditLogs.html">Audit Logging</a> - a guide on how to configure audit logs in ZooKeeper Server and what contents are logged.</li>
</ul>
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<li><strong>Contributors</strong> Documents for Developers Contributing to the ZooKeeper Open Source Project
<ul>
<li><a href="zookeeperInternals.html">ZooKeeper Internals</a> - assorted topics on the inner workings of ZooKeeper</li>
</ul>
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<li><strong>Miscellaneous ZooKeeper Documentation</strong>
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<li><a href="https://cwiki.apache.org/confluence/display/ZOOKEEPER">Wiki</a></li>
<li><a href="https://cwiki.apache.org/confluence/display/ZOOKEEPER/FAQ">FAQ</a></li>
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